इस xml के रूप में सामग्री को देखने के बाद:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/constraint_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
</android.support.constraint.ConstraintLayout>
और इस गतिविधि में:
class SecondActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.item)
val constraintLayout = findViewById(R.id.constraint_layout) as ConstraintLayout
val button = findViewById(R.id.button)
button.setOnClickListener {
val constraintSet = ConstraintSet()
constraintSet.clone(constraintLayout)
constraintSet.setVerticalBias(R.id.button, 1.0f)
constraintSet.setHorizontalBias(R.id.button, 1.0f)
val transition = AutoTransition()
transition.duration = 1500
transition.interpolator = AccelerateDecelerateInterpolator()
TransitionManager.beginDelayedTransition(constraintLayout, transition)
constraintSet.applyTo(constraintLayout)
}
}
}
इस उत्पादन में परिणाम होगा:
देखें this article और this presentation अधिक जानकारी के लिए विवरण।